25 August 2017 Physical chemistry of Nanogap-Enhanced Raman Scattering (NERS)
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Plasmonically coupled electromagnetic field localization has generated a variety of new concepts and applications, and this has been one of the hottest topics in nanoscience, materials science, chemistry, physics and engineering and increasingly more important over the last decade. In particular, plasmonically coupled nanostructures with ultra-small gap (~1-nm or smaller) gap have been of special interest due to their ultra-strong optical properties that can be useful for a variety of signal enhancements such surface-enhanced Raman scattering (SERS) and nanoantenna. These promising nanostructures with extraordinarily strong optical signal, however, have rendered a limited success in widespread use and commercialization largely due to the lack of designing principles, high-yield synthetic strategies with nm-level structural controllability and reproducibility and lack of systematic single-molecule and single-particle level studies. All these are extremely important challenges because even small changes (~1 nm) of the coupled nanogap structures can significant affect plasmon mode and signal intensity and therefore structural and signal reproducibility and controllability can be in question. The plasmonic nanogap-enhanced Raman scattering (NERS) is defined as the plasmonic nanogap-based Raman signal enhancement within plasmonic nanogap particles with ~1 nm gap and a Raman dye positioned inside the gap.
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Yung Doug Suh, Yung Doug Suh, Hyun Woo Kim, Hyun Woo Kim, } "Physical chemistry of Nanogap-Enhanced Raman Scattering (NERS)", Proc. SPIE 10350, Nanoimaging and Nanospectroscopy V, 103500I (25 August 2017); doi: 10.1117/12.2275662; https://doi.org/10.1117/12.2275662

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